Honda NSS250A Owner's Manual page 129

Suspension
Rear Suspension Adjustment
The rear suspension can be adjusted for
rider (and passenger) weight and riding
conditions by changing the spring pre-load.
Do not attempt to disassemble, service, or
dispose of the damper; see your Honda
dealer. The instructions found in this
owner's manual are limited to adjustments
of the shock assembly only.
120
Servicing Your Honda
Rear Suspension Spring Pre-load
LEFT SIDE
(2)
(1) pin spanner
(2) shock absorber
(3) spring pre-load adjuster
(3)
(1)